The Home Battery ReportIndependent · No installer money

Tesla Powerwall 3 vs Anker SOLIX X1

A straight, side by side read on specs and warranties, with the honest caveats. Every figure is from the manufacturer datasheet; sources are at the bottom.

Figure - Specs to scalebars vs the largest in our database
Tesla Powerwall 3 versus Anker SOLIX X1: specs to scaleHorizontal bars comparing usable capacity, continuous power, peak power, warranty for Tesla Powerwall 3 and Anker SOLIX X1, each scaled against the largest value in the home battery database.Tesla Powerwall 3Anker SOLIX X1Usable capacity13.5 kWhNot publishedContinuous power11.5 kW6 kWPeak powerNot published12 kWWarranty10 yr10 yr
SpecTesla Powerwall 3Anker SOLIX X1
ChemistryNot publishedLFP
Usable capacity13.5 kWh10, 15, or 20 kWh nominal per module (usable not published)
Continuous power11.5 kW6 kW
Peak powerNot published12 kW
Round-trip efficiency89%90.2%
Warranty10 years10 years limited
Backup scopeWhole-home capableWhole-home capable
InverterIntegratedIntegrated

What actually differs

  • More continuous power: the Tesla Powerwall 3 sustains 11.5 kW vs 6 kW, which matters for running big loads like an AC at once.
  • Efficiency is not apples to apples here: the Tesla Powerwall 3 quotes 89% (solar round trip (solar to battery to home), CEC weighted; not a pure AC to AC figure) and the Anker SOLIX X1 quotes 90.2% (AC to battery to AC at 77F), so do not read the raw numbers as a direct ranking.

Which one pays off is a numbers question.

Neither spec sheet tells you the payback in your home. That comes from your rate plan and incentives.

Run the Worth It calculator →

Sources

Source: Tesla Powerwall 3 datasheet, 2026. Specs verified 2026-07-01. Figures are per single unit at beginning of life; confirm the current datasheet with your installer.

Source: Anker SOLIX X1 AC-coupled datasheet (US), rev 2025-03. Specs verified 2026-07-01. Figures are per single unit at beginning of life; confirm the current datasheet with your installer.